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JPL Small-Body Database Browser
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253 Mathilde
Classification: Main-belt Asteroid          SPK-ID: 2000253
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 209 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2629101450106395 2.0728e-08  
a 2.648975057333826 4.6565e-09 au
q 1.952532640880623 5.392e-08 au
i 6.738632112216882 3.3283e-06 deg
node 179.555000037428 1.8746e-05 deg
peri 157.6800371558868 1.9079e-05 deg
M 38.70174210696717 5.1472e-06 deg
tp 2458431.205345951431
(2018-Nov-08.70534595)
2.2318e-05 TDB
period 1574.763102111449
4.31
4.1523e-06
1.137e-08
d
yr
n .2286058134822377 6.0278e-10 deg/d
Q 3.345417473787029 5.8807e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3893  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      48939 days (133.99 yr)  
   first obs. used      1885-12-01  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46232  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:04:25  

Additional Information
 Earth MOID = .94468 au 
 Jupiter MOID = 2.07287 au 
 T_jup = 3.332 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.3   n/a MPO267706  
diameter diameter 52.8 km n/a n/a Yeomans E-mail 2001-Apr-04
GM GM 0.00689 km^3/s^2 0.00030 Yeomans et al. (1997) Science v.278, pp.2106-2109  
bulk density density 1.3 g/cm^3 0.2 Yeomans et al. (1997) Science v.278, pp.2106-2109 based on a nominal volume of 78000 km^3 (with lower/uppper limits of 67000/90000 km^3)
rotation period rot_per 417.7 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Mottola, S.; Sears, W.D.; Erikson, A.; Harris, A.W.; et al. (1995) Planet. Space Sci. 43, 1609-1613.]
[Pravec, P.; et al. (2005) Icarus 173, 108-131.]
geometric albedo albedo 0.0436   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20
SMASSII spectral type spec_B Cb   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

253 Mathilde          Discovered 1885-Nov-12 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 OL1 = A915 TN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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